{"service":"SolMachina","purpose":"Ed25519 public key that signs SolMachina Intelligence Receipts (SIR) and the release manifest","pubkeyBase58":"F6MuJrBUAwsioPbehkNJqSLEpy6423jcDJjAXyqp221j","role":"facilitator fee-payer — the same public identity that submits on-chain settlements (visible in every 402 challenge)","scheme":"ed25519","receiptHeader":"X-SolMachina-Receipt (base64 JSON) — present on every paid /v1 response","verifyOffline":"canonicalReceipt = JSON of the receipt object WITHOUT its `signature` field; ed25519.verify(utf8(canonicalReceipt), base58decode(signature.signatureBase58), base58decode(signedBy)) === true"}